The archives of William Lock cover the period of his career at CERN. They include files concerning collaborations between CERN and other countries, organisations and laboratories; staff, associates and fellowships; administration and finance; management of CERNs scientific programme, etc. The collection includes: minutes, budgets and finance documents, documents relating to personnel, fellows and visitors, correspondence, chronofiles, papers relating to various schools and conferences, Directorate, Executive Board, and Management Board records, reports, note, agreements, administrative circulars and papers for the Director-General, and files about relations with member and non-member states from 1962 to 1993, particularly the USSR (including correspondence with the Institute of High Energy Physics (IHEP) at Serpukhov and Joint Institute for Nuclear Research (JINR) at Dubna).